Syntax Highlighting — Full TextMate grammar for .gs files
IntelliSense — Completions, hover info, signature help
Navigation — Go to definition, find references, document symbols, workspace symbols
Refactoring — Rename, code actions (quick fixes)
Diagnostics — Real-time errors and warnings as you type
Formatting — Document formatting, range formatting, and on-type formatting
Semantic Highlighting — Rich semantic token types for precise colorization
Inlay Hints — Parameter names and inferred types
CodeLens — Reference counts above functions and types
Debugging — Launch and debug GSharp applications (via CoreCLR debugger)
Test Explorer — Discover, run, and debug tests
Build Integration — Build, run, and clean commands with error reporting
Snippets — Common code patterns (functions, classes, loops, etc.)
Themes — Six color themes inspired by the G# logo's amber-to-red palette: Ember, Magma, and Synthwave, each in Dark and Light variants
Requirements
.NET 10 Runtime or newer (the language server targets net10.0). When a compatible runtime is not already on the machine, the extension automatically downloads one via the .NET Install Tool (installed as a dependency). If automatic acquisition is not possible (for example, the machine is offline with nothing cached), the extension shows a single actionable prompt instead of failing silently.
Wait for a debugger to attach to the language server
gsharp.trace.server
"off"
Trace LSP communication (off, messages, verbose)
gsharp.diagnostics.enableOnType
true
Run diagnostics on every keystroke
gsharp.completion.triggerOnDot
true
Trigger completion after typing .
gsharp.codeLens.enableReferences
true
Show reference counts
gsharp.inlayHints.enableParameterNames
true
Show parameter name hints
gsharp.inlayHints.enableTypeHints
true
Show inferred type hints
gsharp.coldStartCache.enable
true
Persist language-service project metadata
Language feature settings take effect after running GSharp: Restart Language Server.
Formatting is canonical and option-free: 4 spaces, K&R braces, and a fixed
120-column width. Format-on-save is enabled for G# by default.
Commands
Command
Description
GSharp: Restart Language Server
Restart the language server
GSharp: Show Output Channel
Show the GSharp output channel
GSharp: Build Project
Build the GSharp project
GSharp: Run Project
Run the GSharp project
GSharp: Generate Build & Debug Assets
Generate .vscode/tasks.json and launch.json
GSharp: Run Tests at Cursor
Run tests at the current cursor position
GSharp: Debug Tests at Cursor
Debug tests at the current cursor position
GSharp: Report Issue
Open GitHub Issues for bug reports
Development
cd src/vscode-gsharp
npm install
npm run compile
# Press F5 in VS Code to launch the Extension Host
